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9-103.

North City High School has served the following number of lunches since the beginning of the school year. The data has been sorted.

Number of lunches sold per day

 $576$ $584$ $594$ $595$ $603$ $605$ $606$ $613$ $618$ $630$ $632$ $636$ $640$ $640$ $652$ $660$ $661$ $663$ $665$ $666$ $671$ $671$ $675$ $677$ $678$ $689$ $695$ $698$ $703$ $721$ $723$ $738$ $745$ $755$ $774$ $774$ $785$ checksum $24711$

Use the eTool at the bottom for parts (a) - (c).

1. What are the mean and standard deviation number of lunches in the sample?

2. What is the five number summary of the distribution?

3. Make a relative frequency histogram of the number of lunches served. Use a scale from $560$ to $800$ lunches, with a bin width of $40$ lunches. Sketch the histogram and label the height of each of the bins.

4. Describe the distribution. Make sure you consider the center, shape, spread, and outliers.

The typical number of lunches served is_____.
The shape is _____ and _____.
The standard deviation is about _____ lunches.
There are/are not apparent ouliers.

5. Using your histogram, determine the percent of days on which fewer than $600$ lunches were sold.

1. Using the histogram, estimate the percent of days on which between $600$ and $700$ lunches were sold.

Use the eTool below for parts (a) - (c).
Click the link at right for the full version of the eTool: CCA2 9-103 HW eTool